# 21689510 Service Kit | Genuine Volvo Penta Part

🔧 Product Description

  

Genuine Volvo Penta D1 / D2 Vacuum Breaker and Anti-Siphon Service Kit - Part Number: 21689510

  

A genuine Volvo Penta service package for the cooling-system vacuum valve used on selected D1 and D2 marine diesels. The anti-siphon valve prevents raw water continuing to flow into the exhaust system when the engine is stopped.

  

Kit Contents:

  

• 1 x vacuum-breaker valve element - supplied under Volvo Penta kit 21689510

• 1 x valve end cap - supplied under Volvo Penta kit 21689510

• Internal sealing component - supplied with the complete service kit; no separate public part number is listed

  

⚙️ Key Features

  

• Genuine Volvo Penta anti-siphon service kit

• Restores vacuum-valve operation

• Suitable for selected D1 and D2 exhaust / cooling installations

• Protects against seawater siphoning

• Small service kit for the existing valve body

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 21689510 current Volvo Penta vacuum-valve service-kit reference

  

OEM / Related Numbers:

  

• 21689510

• D1 / D2 vacuum breaker, raw-water hose and exhaust-riser components

  

Aftermarket / Verified Equivalents:

  

• No direct aftermarket equivalent guaranteed for the Volvo valve body

  

🚤 Compatibility

  

Commonly used on:

  

• Anti-siphon valve servicing

• Raw-water cooling maintenance

• Prevention of water entering the exhaust manifold

  

Typically suits:

  

• Engine models / drive models:

• D1-13 / D1-20 / D1-30 installations with the Volvo vacuum valve

• D2-40 / D2-50 / D2-55 / D2-60 / D2-75 installations where kit 21689510 is specified

  

• HP Range: Approximately 13HP - 75HP

• Engine Type: Volvo Penta D1 / D2 marine diesel raw-water cooling and exhaust system

• Year Range: Model-generation controlled

• Serial Range: Vessel installation and anti-siphon valve design controlled; confirm the cooling-system accessory diagram

  

🔌 Function

  

The valve admits air when the raw-water pump stops, breaking the siphon and preventing seawater from flooding the exhaust and engine.

  

Common signs replacement or overhaul is required:

  

• Valve drips or remains blocked with salt deposits

• Water siphons through the exhaust after shutdown

• Vacuum breaker does not admit air

• Valve cap or seal is damaged

• Routine anti-siphon maintenance is due

  

📦 Condition

  

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 54.87 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 54.87 AUD | In stock |

## Images

- 21689510 Service Kit | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21689510-service-kit-genuine-volvo-penta)
> Updated: 2026-07-30